text: #!/usr/bin/env node
  
  // maintainer note - x.y.z-ab version in package.json -> x.y.z
  var version = require('./package').version.replace(/-.*/, '')
  
  var fs = require('fs')
  var os = require('os')
  var path = require('path')
  var extract = require('extract-zip')
  var download = require('electron-download')
  
  var platform = os.platform()
  
  function onerror (err) {
    throw err
  }
  
  var paths = {
    darwin: path.join(__dirname, './dist/Electron.app/Contents/MacOS/Electron'),
    linux: path.join(__dirname, './dist/electron'),
    win32: path.join(__dirname, './dist/electron.exe')
  }
  
  if (!paths[platform]) throw new Error('Unknown platform: ' + platform)
  
  // downloads if not cached
  download({version: version, arch: process.env.npm_config_arch}, extractFile)
  
  // unzips and makes path.txt point at the correct executable
  function extractFile (err, zipPath) {
    if (err) return onerror(err)
    fs.writeFile(path.join(__dirname, 'path.txt'), paths[platform], function (err) {
      if (err) return onerror(err)
      extract(zipPath, {dir: path.join(__dirname, 'dist')}, function (err) {
        if (err) return onerror(err)
      })
    })
  }
  